510 cartridge is one of the classic Joye cartridges with tissues inside. The refilled cartridges can make you easy to vape without troubles for dripping liquid.
For continuous use, Just drip into the tissues inside the cartridges till it is fully absorbed. The refilled cartridges are packaged with flavor and strength stamped on it.
Potentially, an over-used cartridge could damage the atomizing unit and will also detract you from the vaping experience. For your better use, changing cartridges from time to time is needed.